Q. No. 2 Let N be the set of natural numbers and N = N U {∞}. Define a function d: N* × N* → R as follows; for m,n in N, d(m, n) = Im d(m, 0) = d(∞,m) = - and d(∞, 00) = 0, 1 m Show that (N°, d) is a metric space.

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Q: (-1,2, 3).

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